Current File : //usr/share/man/man3ssh2/libssh2_session_supported_algs.3ssh2

'\" te
.TH libssh2_session_supported_algs 3 "23 Oct 2011" "libssh2 1.4.0" "libssh2 manual"
.SH NAME
libssh2_session_supported_algs - get list of supported algorithms
.SH SYNOPSIS
.nf
#include <libssh2.h>

int libssh2_session_supported_algs(LIBSSH2_SESSION* session,
                                   int method_type,
                                   const char*** algs);
.SH DESCRIPTION
\fIsession\fP - An instance of initialized LIBSSH2_SESSION (the function will
use its pointer to the memory allocation function).  \fImethod_type\fP - Method
type. See .BR \fIlibssh2_session_method_pref(3)\fP.  \fIalgs\fP - Address of a
pointer that will point to an array af returned algorithms

Get a list of supported algorithms for the given \fImethod_type\fP. The
method_type parameter is equivalent to method_type in
\fIlibssh2_session_method_pref(3)\fP. If successful, the function will
allocate the appropriate amount of memory. When not needed anymore, it must be
deallocated by calling \fIlibssh2_free(3)\fP. When this function is
unsuccessful, this must not be done.

In order to get a list of all supported compression algorithms,
libssh2_session_flag(session, LIBSSH2_FLAG_COMPRESS, 1) must be called before
calling this function, otherwise only "none" will be returned.

If successful, the function will allocate and fill the array with supported
algorithms (the same names as defined in RFC 4253).  The array is not NULL
terminated.
.SH EXAMPLE
.nf
#include "libssh2.h"

const char **algorithms;
int rc, i;
LIBSSH2_SESSION *session;

/* initilize session */
session = libssh2_session_init();
rc = libssh2_session_supported_algs(session,
                                    LIBSSH2_METHOD_CRYPT_CS,
                                    &algorithms);
if (rc>0) {
    /* the call succeeded, do sth. with the list of algorithms
       (e.g. list them)... */
    printf("Supported symmetric algorithms:\n");
    for ( i=0; i<rc; i++ )
        printf("\t%s\n", algorithms[i]);

    /* ... and free the allocated memory when not needed anymore */
    libssh2_free(session, algorithms);
}
else {
    /* call failed, error handling */
}
.SH RETURN VALUE
On success, a number of returned algorithms (i.e a positive number will be
returned).  In case of a failure, an error code (a negative number, see below)
is returned.  0 should never be returned.
.SH ERRORS
\fILIBSSH2_ERROR_BAD_USE\fP - Invalid address of algs.

\fILIBSSH2_ERROR_METHOD_NOT_SUPPORTED\fP -  Unknown method type.

\fILIBSSH2_ERROR_INVAL\fP - Internal error (normally should not occur).

\fILIBSSH2_ERROR_ALLOC\fP - Allocation of memory failed.
.SH AVAILABILITY
Added in 1.4.0

.\" Oracle has added the ARC stability level to this manual page
.SH ATTRIBUTES
See
.BR attributes (5)
for descriptions of the following attributes:
.sp
.TS
box;
cbp-1 | cbp-1
l | l .
ATTRIBUTE TYPE	ATTRIBUTE VALUE 
=
Availability	library/libssh2
=
Stability	Uncommitted
.TE 
.PP
.SH SEE ALSO
.BR libssh2_session_methods(3),
.BR libssh2_session_method_pref(3)
.BR libssh2_free(3)


.SH NOTES

.\" Oracle has added source availability information to this manual page
This software was built from source available at https://java.net/projects/solaris-userland.  The original community source was downloaded from  http://www.libssh2.org/download/libssh2-1.4.2.tar.gz

Further information about this software can be found on the open source community website at http://www.libssh2.org/.